Cartridge Heaters

Cartridge Heaters
CARTRIDGE
Hotwatt manufactures a wide range of cartridge heating units for a variety of applications. This size, sheath, leads, terminals, wattage and voltage
can be adapted to your heating requirements.
Hotwatt can provide you with heating units manufactured to your specifications to accommodate your application. Hotwatt stocks all material for
the different diameter units listed in this catalog. Your order, specifying the wattage, voltage, diameter, length and lead type is readily and quickly
fabricated from our inventory. In addition, many standard sizes are available from stock for immediate delivery.
Web: www.hotwatt.com
Email: sales@hotwatt.com
1
Cartridge Heaters
U.L. Recognized – E56973
C.S.A. Certified 016386-0-000
CARTRIDGE
Low to Medium Watt Density
Applications:
Compressor Crankcase Heating, Copiers, Dies, Food Processing,
Glue Pots, Heat Sealing, Hot Melt Adhesive, Labeling, Medical
Equipment, Packaging, Photographic Processing, Plastic Molding,
Platens, Wax Pots.
Construction:
1 Heliarc welded end seal.
2 Mica.
3 Series 300 stainless steel sheath of precision dimensions and
Features:
tolerances for intimate, stable, non-oxidizing contact with
cavities machined for them.
• Hotwatt Precision Cartridge Heaters provided localized heat to
restricted work areas requiring close thermal control. Dies,
platens, and a variety of other types of processing equipment are
efficiently heated. Closely controlled work temperatures up to
1250ºF are obtained by a combination of heater location and
proper wattage output.
• Basic designs are readily adaptable to a wide variety of special
requirements, sizes, or ratings.
• Maximum surface temperatures up to 1250º F (677ºC).
• Designations are etched on the sheath to preserve accurate
shape.
• Heating elements arranged just beneath outside surface for
maximum heat transfer, minimum core temperature and faster
heating.
4
5
6
7
8
Element wire situated in close proximity to outside surface for
maximum heat transfer and minimum internal temperature
while preserving good dielectric qualities.
Magnesium oxide packing.
Ceramic element support.
Ceramic cap.
Teflon insulated leads: 1⁄4" diameter
Fiberglass leads: 5⁄16" – 3⁄4" diameter
Post terminals: 15⁄16" – 23⁄8"
• Made in U.S.A.
• Where specified, units can be supplied liquid tight.
• Long, trouble free service.
12
2
3
4
5
Phone: 978-777-0070
6
Fax: 978-774-2409
7
8
Cartridge Heaters
Low to Medium Watt Density
Round
Diameter:
Maximum Amperage:
1
⁄8" (.124/.120)
2 Not UL/CSA
⁄32" (.155/.152)
2 Not UL/CSA
Sheath
Length
1"
11⁄2"
2"
21⁄2"
3"
31⁄2"
4"
41⁄2"
5"
51⁄2"
6"
61⁄2"
7"
71⁄2"
8"
81⁄2"
9"
91⁄2"
10"
101⁄2"
11"
111⁄2"
12"
For longer lengths,
compute wattage at:
Min.
Cat. No. Watts
SC12-1
10
SC12-1.5
10
SC12-2
10
SC12-2.5
10
SC12-3
10
SC12-3.5
10
SC12-4
10
SC12-4.5
10
SC12-5
10
SC12-5.5
10
SC12-6
10
SC12-6.5
10
SC12-7
10
SC12-7.5
10
SC12-8
10
SC12-8.5
10
SC12-9
10
SC12-9.5
10
SC12-10
10
SC12-10.5 10
SC12-11
10
SC12-11.5 10
SC12-12
10
⁄16" (.186/.183)
3.5
5
Max.
Watts
15
25
35
45
55
65
75
85
95
105
115
125
135
145
155
165
175
185
195
205
215
225
235
Min.
Cat. No. Watts
SC15-1
10
SC15-1.5
10
SC15-2
10
SC15-2.5
10
SC15-3
10
SC15-3.5
10
SC15-4
10
SC15-4.5
10
SC15-5
10
SC15-5.5
10
SC15-6
10
SC15-6.5
10
SC15-7
10
SC15-7.5
10
SC15-8
10
SC15-8.5
10
SC15-9
10
SC15-9.5
10
SC15-10
10
SC15-10.5 10
SC15-11
10
SC15-11.5 10
SC15-12
10
10 watts per linear 1⁄2"
3
Max.
Watts
15
25
35
45
55
65
75
85
95
105
115
125
135
145
155
165
175
185
195
205
215
225
235
10 watts per linear 1⁄2"
Min.
Cat. No. Watts
SC18-1
10
SC18-1.5
10
SC18-2
10
SC18-2.5
10
SC18-3
10
SC18-3.5
10
SC18-4
10
SC18-4.5
10
SC18-5
10
SC18-5.5
10
SC18-6
10
SC18-6.5
10
SC18-7
10
SC18-7.5
10
SC18-8
10
SC18-8.5
10
SC18-9
10
SC18-9.5
10
SC18-10
10
SC18-10.5 10
SC18-11
10
SC18-11.5 10
SC18-12
10
Max.
Watts
20
32
44
55
70
80
95
105
120
132
145
157
170
182
195
207
220
232
245
257
270
282
295
CARTRIDGE
▼ Manfactured Items ▼
12 watts per linear 1⁄2"
• Lengths longer than those listed may be ordered.
Wattage
Minimum Wattage
The following table should be used to determine the
allowable voltage for low wattage miniature elemnets:
1
3
Size:
⁄8" Dia.- 5⁄32" Dia.
⁄16" Dia.
Length
30v 60v 120v 230v 30v 60v 120v 230v
1”
.6w 2.5w 10w NA
.8w 3w 12w NA
11⁄2"
.6w 2.5w 10w NA
.5w 2w 8w 30w
2”
.5w 2w 8w 27w .4w 1.5w 6w 22w
NA-Not Available
▼ IN STOCK ITEMS ▼
Diameter: 1⁄8"
Diameter: 3⁄16"
Length
Cat.No.
Watts
Volts
1"
1"
11⁄2"
11⁄2"
2"
SC12-1
SC12-1
SC12-1.5
SC12-1.5
SC12-2
10
15
20
25
35
120
120
120
120
120
Watt Approx.
Density Wght.
w/in.2
(lbs.)
35
50
40
50
50
.01
.01
.03
.03
.06
Diameter: 5⁄32"
Length
Cat.No.
Watts
Volts
1"
11⁄2"
2"
SC15-1
SC15-1.5
SC15-2
10
20
35
120
120
120
Length
Cat.No.
Watts
Volts
11⁄2"
2"
3"
4"
4"
4"
SC18-1.5
SC18-2
SC18-3
SC18-4
SC18-4
SC18-4
30
35
65
90
60
100
120
120
120
120
120
120
Watt Approx.
Density Wght.
w/in.2
(lbs.)
40
35
40
40
25
45
.07
.09
.11
.13
.13
.13
Watt Approx.
Density Wght.
w/in.2
(lbs.)
25
35
40
.05
.07
.09
Web: www.hotwatt.com
Email: sales@hotwatt.com
3
Cartridge Heaters
CARTRIDGE
Low to Medium Watt Density
▼ Manfactured Items ▼
Diameter:
Maximum Amperage:
Sheath
Length
1"
11⁄2"
2"
21⁄2"
3"
31⁄2"
4"
41⁄2"
5"
51⁄2"
6"
61⁄2"
7"
71⁄2"
8"
81⁄2"
9"
91⁄2"
10"
101⁄2"
11"
111⁄2"
12"
For longer lengths,
compute wattage at:
⁄4" (.249/.245)
3.5
⁄16" (.311/.307)
6
1
Cat. No.
SC25-1
SC25-1.5
SC25-2
SC25-2.5
SC25-3
SC25-3.5
SC25-4
SC25-4.5
SC25-5
SC25-5.5
SC25-6
SC25-6.5
SC25-7
SC25-7.5
SC25-8
SC25-8.5
SC25-9
SC25-9.5
SC25-10
SC25-10.5
SC25-11
SC25-11.5
SC25-12
⁄8" (.374/.370)
6
5
Min.
Watts
Max.
Watts
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
25
50
75
100
125
150
175
200
225
250
275
300
325
350
375
400
425
450
475
500
525
550
575
Cat. No.
Min.
Watts
Max.
Watts
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
35
70
105
140
175
210
245
285
325
360
395
430
465
500
535
570
605
640
675
710
745
780
815
SC32-1
SC32-1.5
SC32-2
SC32-2.5
SC32-3
SC32-3.5
SC32-4
SC32-4.5
SC32-5
SC32-5.5
SC32-6
SC32-6.5
SC32-7
SC32-7.5
SC32-8
SC32-8.5
SC32-9
SC32-9.5
SC32-10
SC32-10.5
SC32-11
SC32-11.5
SC32-12
25 watts per linear 1⁄2"
3
Cat. No.
SC37-1
SC37-1.5
SC37-2
SC37-2.5
SC37-3
SC37-3.5
SC37-4
SC37-4.5
SC37-5
SC37-5.5
SC37-6
SC37-6.5
SC37-7
SC37-7.5
SC37-8
SC37-8.5
SC37-9
SC37-9.5
SC37-10
SC37-10.5
SC37-11
SC37-11.5
SC37-12
35 watts per linear 1⁄2"
Min.
Watts
Max.
Watts
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
35
70
105
140
175
210
245
285
325
360
395
430
465
500
535
570
605
640
675
710
745
780
815
35 watts per linear 1⁄2"
• Lengths longer than those listed may be ordered.
▼ IN STOCK ITEMS ▼
Diameter: 1⁄4" (continued)
Diameter: 1⁄4"
Length
1"
11⁄4"
11⁄2"
11⁄2"
11⁄2"
11⁄2"
11⁄2"
11⁄2"
2"
2"
2"
21⁄4"
21⁄4"
21⁄2"
21⁄2"
21⁄2"
4
Cat.No.
SC25-1
SC25-1.25
SC25-1.5
SC25-1.5
SC25-1.5
SC25-1.5
SC25-1.5
SC25-1.5
SC25-2
SC25-2
SC25-2
SC25-2.25
SC25-2.25
SC25-2.5
SC25-2.5
SC25-2.5
Watts
Volts
20
20
7
12
30
30
50
50
12
50
50
20
75
20
65
65
120
120
120
120
120
240
120
240
120
120
240
120
240
120
120
240
Watt Approx.
Density Wght.
w/in.2
(lbs.)
35
25
7
12
30
30
50
50
9
35
35
12
50
9
35
35
.01
.01
.02
.02
.02
.02
.02
.02
.03
.03
.03
.03
.03
.04
.04
.04
Phone: 978-777-0070
Length
Cat.No.
Watts
Volts
3"
3"
31⁄2"
31⁄2"
31⁄2"
4"
4"
4"
41⁄2"
41⁄2"
41⁄2"
7"
7"
7"
SC25-3
SC25-3
SC25-3.5
SC25-3.5
SC25-3.5
SC25-4
SC25-4
SC25-4
SC25-4.5
SC25-4.5
SC25-4.5
SC25-7
SC25-7
SC25-7
25
100
25
90
90
25
110
110
25
110
110
40
150
150
120
240
120
120
240
120
120
240
120
120
240
120
120
240
Fax: 978-774-2409
Watt Approx.
Density Wght.
w/in.2
(lbs.)
11
45
9
35
35
10
40
40
7
30
30
8
29
29
.05
.05
.06
.06
.06
.07
.07
.07
.08
.08
.08
.12
.12
.12
Cartridge Heaters
Low to Medium Watt Density
Diameter: 3⁄8"
Length
Cat.No.
Watts
Volts
1"
11⁄2"
11⁄2"
11⁄2"
11⁄2"
11⁄2"
2"
2"
2"
2"
21⁄2"
21⁄2"
21⁄2"
3"
3"
3"
31⁄2"
31⁄2"
31⁄2"
4"
4"
4"
4"
4"
41⁄2"
41⁄2"
41⁄2"
5"
5"
5"
51⁄2"
51⁄2"
6"
6"
6"
8"
8"
8"
9"
9"
9"
10"
10"
10"
12"
12"
12"
SC37-1
SC37-1.5
SC37-1.5
SC37-1.5
SC37-1.5
SC37-1.5
SC37-2
SC37-2
SC37-2
SC37-2
SC37-2.5
SC37-2.5
SC37-2.5
SC37-3
SC37-3
SC37-3
SC37-3.5
SC37-3.5
SC37-3.5
SC37-4
SC37-4
SC37-4
SC37-4
SC37-4
SC37-4.5
SC37-4.5
SC37-4.5
SC37-5
SC37-5
SC37-5
SC37-5.5
SC37-5.5
SC37-6
SC37-6
SC37-6
SC37-8
SC37-8
SC37-8
SC37-9
SC37-9
SC37-9
SC37-10
SC37-10
SC37-10
SC37-12
SC37-12
SC37-12
30
10
30
30
50
50
15
70
70
100
25
100
100
20
75
75
40
150
150
20
55
75
220
220
60
250
250
70
280
280
25
100
90
350
350
125
500
500
140
550
550
100
400
400
150
600
600
120
120
120
240
120
240
120
120
240
120
120
120
240
120
120
240
120
120
240
120
120
240
120
240
120
120
240
120
120
240
120
240
120
120
240
120
120
240
120
120
240
120
120
240
120
120
240
Web: www.hotwatt.com
Watt Approx.
Density Wght.
w/in.2
(lbs.)
40
5
20
20
40
40
9
35
35
50
10
40
40
6
25
25
12
50
50
5
12
20
50
50
12
50
50
12
50
50
4
15
12
50
50
14
58
58
14
55
55
9
36
36
11
45
45
.04
.07
.07
.07
.07
.07
.09
.09
.09
.09
.12
.12
.12
.15
.15
.15
.18
.18
.18
.20
.20
.20
.20
.20
.23
.23
.23
.27
.27
.27
.31
.31
.36
.36
.36
.16
.16
.18
.18
.18
.18
.20
.20
.20
.22
.22
.22
Email: sales@hotwatt.com
CARTRIDGE
▼ IN STOCK ITEMS (Continued) ▼
5
Cartridge Heaters
CARTRIDGE
Low to Medium Watt Density
▼ Manfactured Items ▼
Diameter:
Maximum Amperage:
Sheath
Length
1"
11⁄2"
2"
21⁄2"
3"
31⁄2"
4"
41⁄2"
5"
51⁄2"
6"
61⁄2"
7"
71⁄2"
8"
81⁄2"
9"
91⁄2"
10"
101⁄2"
11"
111⁄2"
12"
For longer lengths,
compute wattage at:
⁄2" (.499/.494)
10
⁄8" (.624/.619)
10
1
Cat. No.
SC50-1
SC50-1.5
SC50-2
SC50-2.5
SC50-3
SC50-3.5
SC50-4
SC50-4.5
SC50-5
SC50-5.5
SC50-6
SC50-6.5
SC50-7
SC50-7.5
SC50-8
SC50-8.5
SC50-9
SC50-9.5
SC50-10
SC50-10.5
SC50-11
SC50-11.5
SC50-12
⁄4" (.749/.741)
15
5
Min.
Watts
Max.
Watts
Cat. No.
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
55
100
145
190
235
280
325
370
415
460
505
550
595
640
685
730
775
820
865
910
955
1000
1045
SC62-1
SC62-1.5
SC62-2
SC62-2.5
SC62-3
SC62-3.5
SC62-4
SC62-4.5
SC62-5
SC62-5.5
SC62-6
SC62-6.5
SC62-7
SC62-7.5
SC62-8
SC62-8.5
SC62-9
SC62-9.5
SC62-10
SC62-10.5
SC62-11
SC62-11.5
SC62-12
45 watts per linear 1⁄2"
3
Min.
Watts
Max.
Watts
Cat. No.
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
60
120
180
240
300
360
420
480
540
600
660
720
780
840
900
960
1020
1080
1140
1200
1260
1320
1380
SC75-1.5
SC75-2
SC75-2.5
SC75-3
SC75-3.5
SC75-4
SC75-4.5
SC75-5
SC75-5.5
SC75-6
SC75-6.5
SC75-7
SC75-7.5
SC75-8
SC75-8.5
SC75-9
SC75-9.5
SC75-10
SC75-10.5
SC75-11
SC75-11.5
SC75-12
60 watts per linear 1⁄2"
Min.
Watts
Max.
Watts
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
140
210
280
350
420
490
560
630
700
770
840
910
980
1050
1120
1190
1260
1330
1400
1470
1540
1610
70 watts per linear 1⁄2"
• Lengths longer than those listed may be ordered.
▼ IN STOCK ITEMS ▼
Diameter: 1⁄2" (continued)
Diameter: 1⁄2"
Length
Cat.No.
Watts
Volts
1 ⁄2"
11⁄2"
11⁄2"
11⁄2"
2"
2"
2"
21⁄2"
21⁄2"
21⁄2"
21⁄2"
3"
3"
3"
4"
SC50-1.5
SC50-1.5
SC50-1.5
SC50-1.5
SC50-2
SC50-2
SC50-2
SC50-2.5
SC50-2.5
SC50-2.5
SC50-2.5
SC50-3
SC50-3
SC50-3
SC50-4
18
75
75
90
30
120
120
40
80
150
150
50
200
200
70
120
120
240
120
120
120
240
120
120
120
240
120
120
240
120
1
6
Watt Approx.
Density Wght.
w/in.2
(lbs.)
12
50
50
60
12
50
50
12
25
50
50
12
50
50
12
.07
.07
.07
.07
.11
.11
.11
.14
.14
.14
.14
.17
.17
.17
.23
Phone: 978-777-0070
Length
Cat.No.
Watts
Volts
4"
4"
5"
5"
5"
6"
6"
6"
7"
7"
7"
8"
8"
8"
10"
SC50-4
SC50-4
SC50-5
SC50-5
SC50-5
SC50-6
SC50-6
SC50-6
SC50-7
SC50-7
SC50-7
SC50-8
SC50-8
SC50-8
SC50-10
275
275
85
350
350
110
425
425
135
550
550
160
650
650
210
120
240
120
120
240
120
120
240
120
120
240
120
120
240
120
Fax: 978-774-2409
Watt Approx.
Density Wght.
w/in.2
(lbs.)
50
50
12
50
50
12
50
50
14
55
55
14
55
55
14
.23
.23
.27
.27
.27
.33
.33
.33
.48
.48
.48
.53
.53
.53
.62
Cartridge Heaters
Low to Medium Watt Density
Diameter: 1⁄2" (continued)
Diameter: 5⁄8" (continued)
Length
Cat.No.
Watts
Volts
10"
10"
12"
12"
12"
14"
14"
16"
16"
18"
18"
24"
24"
SC50-10
SC50-10
SC50-12
SC50-12
SC50-12
SC50-14
SC50-14
SC50-16
SC50-16
SC50-18
SC50-18
SC50-24
SC50-24
850
850
250
1000
1000
250
1000
250
1000
300
1200
450
1800
120
240
120
120
240
120
240
120
240
120
240
120
240
Watt Approx.
Density Wght.
w/in.2
(lbs.)
55
55
14
55
55
12
48
10
41
11
44
12
49
.62
.62
.69
.69
.69
.48
.48
.52
.52
.57
.57
1.34
1.34
Diameter: 5⁄8"
Length
Cat.No.
Watts
Volts
2 ⁄2"
21⁄2"
21⁄2"
21⁄2"
21⁄2"
3"
3"
3"
31⁄2"
31⁄2"
31⁄2"
31⁄2"
4"
4"
4"
5"
5"
5"
6"
6"
6"
6"
6"
6"
7"
7"
7"
8"
8"
8"
9"
SC62-2.5
SC62-2.5
SC62-2.5
SC62-2.5
SC62-2.5
SC62-3
SC62-3
SC62-3
SC62-3.5
SC62-3.5
SC62-3.5
SC62-3.5
SC62-4
SC62-4
SC62-4
SC62-5
SC62-5
SC62-5
SC62-6
SC62-6
SC62-6
SC62-6
SC62-6
SC62-6
SC62-7
SC62-7
SC62-7
SC62-8
SC62-8
SC62-8
SC62-9
20
50
75
200
200
65
250
250
75
300
300
350
90
350
350
115
450
450
100
135
350
400
540
540
160
635
635
190
750
750
235
120
120
240
120
240
120
120
240
120
120
240
120
120
120
240
120
120
240
120
120
120
240
120
240
120
120
240
120
120
240
120
1
Watt Approx.
Density Wght.
w/in.2
(lbs.)
5
12
20
50
50
12
50
50
12
50
50
60
12
50
50
12
50
50
7
123
30
30
50
50
12
50
50
12
57
57
14
.15
.15
.15
.15
.15
.21
.21
.21
.25
.25
.25
.25
.29
.29
.29
.35
.35
.35
.44
.44
.44
.44
.44
.44
.57
.57
.57
.55
.55
.55
.63
Web: www.hotwatt.com
Length
Cat.No.
Watts
Volts
9"
9"
10"
10"
10"
12"
12"
18"
18"
20"
20"
24"
24"
24"
24"
SC62-9
SC62-9
SC62-10
SC62-10
SC62-10
SC62-12
SC62-12
SC62-18
SC62-18
SC62-20
SC62-20
SC62-24
SC62-24
SC62-24
SC62-24
950
950
250
1000
1000
300
1200
375
1500
375
1500
500
625
2000
2500
120
240
120
120
240
120
240
120
240
120
240
120
120
240
240
Watt Approx.
Density Wght.
w/in.2
(lbs.)
55
55
53
53
53
12
53
11
44
10
40
11
14
44
65
.63
.63
.68
.68
.68
.75
.75
1.03
1.03
1.25
1.25
1.47
1.47
1.47
1.47
CARTRIDGE
▼ IN STOCK ITEMS (Continued) ▼
Diameter: 3⁄4"
Length
Cat.No.
Watts
Volts
21⁄2"
21⁄2"
21⁄2"
31⁄2"
31⁄2"
31⁄2"
31⁄2"
5"
5"
5"
6"
6"
6"
7"
7"
7"
8"
8"
8"
8"
10"
10"
12"
12"
14"
14"
14"
16"
16"
SC75-2.5
SC75-2.5
SC75-2.5
SC75-3.5
SC75-3.5
SC75-3.5
SC75-3.5
SC75-5
SC75-5
SC75-5
SC75-6
SC75-6
SC75-6
SC75-7
SC75-7
SC75-7
SC75-8
SC75-8
SC75-8
SC75-8
SC75-10
SC75-10
SC75-12
SC75-12
SC75-14
SC75-14
SC75-14
SC75-16
SC75-16
60
230
230
90
350
350
350
125
500
500
160
650
650
190
760
760
220
750
885
885
275
1100
325
1300
315
625
1250
450
1800
120
120
240
120
120
240
120
120
120
240
120
120
240
120
120
240
120
120
120
240
120
240
120
240
120
120
120
120
240
Email: sales@hotwatt.com
Watt Approx.
Density Wght.
w/in.2
(lbs.)
12
50
50
12
50
50
60
12
50
50
12
50
50
12
50
50
12
40
50
50
11
45
11
45
10
20
40
12
49
.21
.21
.21
.29
.29
.29
.25
.43
.43
.43
.49
.49
.49
.57
.57
.57
.70
.70
.70
.70
.80
.80
.92
.92
1.03
1.03
1.03
1.14
1.14
7
Cartridge Heaters
Low to Medium Watt Density
CARTRIDGE
▼ IN STOCK ITEMS (Continued) ▼
Diameter: ⁄4" (continued)
3
Length
Cat.No.
Watts
Volts
18"
18"
20"
20"
24"
24"
24"
24"
36"
36"
SC75-18
SC75-18
SC75-20
SC75-20
SC75-24
SC75-24
SC75-24
SC75-24
SC75-36
SC75-36
500
2000
565
2250
595
690
2375
2750
625
2500
120
240
120
240
120
120
240
240
120
240
Watt Approx.
Density Wght.
w/in.2
(lbs.)
12
49
12
49
11
13
43
50
8
36
1.25
1.25
1.40
1.40
1.50
1.50
1.50
1.50
2.05
2.05
▼ Manfactured Items ▼
Diameter:
Maximum Amperage:
Sheath
Length
2"
21⁄2"
3"
31⁄2"
4"
41⁄2"
5"
51⁄2"
6"
61⁄2"
7"
71⁄2"
8"
81⁄2"
9"
91⁄2"
10"
101⁄2"
11"
111⁄2"
12"
For longer lengths,
compute wattage at:
8
⁄16" (.936/.928)
25
1" (.999/.991)
25
15
Cat. No.
SC93-2
SC93-2.5
SC93-3
SC93-3.5
SC93-4
SC93-4.5
SC93-5
SC93-5.5
SC93-6
SC93-6.5
SC93-7
SC93-7.5
SC93-8
SC93-8.5
SC93-9
SC93-9.5
SC93-10
SC93-10.5
SC93-11
SC93-11.5
SC93-12
Min.
Watts
Max.
Watts
Cat. No.
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
280
375
470
565
660
755
850
945
1040
1135
1230
1325
1420
1515
1610
1705
1800
1895
1990
2085
2180
SC1.0-2
SC1.0-2.5
SC1.0-3
SC1.0-3.5
SC1.0-4
SC1.0-4.5
SC1.0-5
SC1.0-5.5
SC1.0-6
SC1.0-6.5
SC1.0-7
SC1.0-7.5
SC1.0-8
SC1.0-8.5
SC1.0-9
SC1.0-9.5
SC1.0-10
SC1.0-10.5
SC1.0-11
SC1.0-11.5
SC1.0-12
95 watts per linear 1⁄2"
11⁄4" (1.249/1.241)
30
Min.
Watts
Max.
Watts
Cat. No.
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
280
375
470
565
660
755
850
945
1040
1135
1230
1325
1420
1515
1610
1705
1800
1895
1990
2085
2180
SC1.2-2
SC1.2-2.5
SC1.2-3
SC1.2-3.5
SC1.2-4
SC1.2-4.5
SC1.2-5
SC1.2-5.5
SC1.2-6
SC1.2-6.5
SC1.2-7
SC1.2-7.5
SC1.2-8
SC1.2-8.5
SC1.2-9
SC1.2-9.5
SC1.2-10
SC1.2-10.5
SC1.2-11
SC1.2-11.5
SC1.2-12
95 watts per linear 1⁄2"
Phone: 978-777-0070
Min.
Watts
Max.
Watts
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
350
470
590
710
830
950
1070
1190
1310
1430
1550
1670
1790
1910
2030
2150
2270
2390
2510
2630
2750
120 watts per linear 1⁄2"
Fax: 978-774-2409
Cartridge Heaters
Low to Medium Watt Density
Diameter:
Maximum Amperage:
1.90" (1.890/1.910)
40
23⁄8" (2.365/2.385)
40
Sheath
Length
Cat. No.
Min.
Watts
Max.
Watts
Cat. No.
Min.
Watts
Max.
Watts
6"
7"
8"
9"
10"
12"
14"
16"
18"
20"
22"
24"
26"
28"
30"
32"
34"
36"
38"
40"
42"
44"
46"
48"
SC1.9-6
SC1.9-7
SC1.9-8
SC1.9-9
SC1.9-10
SC1.9-12
SC1.9-14
SC1.9-16
SC1.9-18
SC1.9-20
SC1.9-22
SC1.9-24
SC1.9-26
SC1.9-28
SC1.9-30
SC1.9-32
SC1.9-34
SC1.9-36
SC1.9-38
SC1.9-40
SC1.9-42
SC1.9-44
SC1.9-46
SC1.9-48
500
500
500
500
500
500
500
500
500
500
500
500
500
500
500
500
500
500
500
500
500
500
500
500
1400
1700
1960
2240
2500
3100
3650
4200
4750
5300
5900
6450
7000
7550
8100
8700
9250
9800
10350
10900
11500
12000
12600
13200
SC2.3-8
SC2.3-9
SC2.3-10
SC2.3-12
SC2.3-14
SC2.3-16
SC2.3-18
SC2.3-20
SC2.3-22
SC2.3-24
SC2.3-26
SC2.3-28
SC2.3-30
SC2.3-32
SC2.3-34
SC2.3-36
SC2.3-38
SC2.3-40
SC2.3-42
SC2.3-44
SC2.3-46
SC2.3-48
500
500
500
500
500
500
500
500
500
500
500
500
500
500
500
500
500
500
500
500
500
500
2300
2650
3000
3630
4300
5000
5600
6270
6930
7600
8250
8900
9570
10250
10900
11550
12200
12870
13530
14200
14850
15500
For longer lengths,
compute wattage at:
280 watts per linear 1"
CARTRIDGE
▼ Manfactured Items ▼
330 watts per linear 1"
• Lengths longer than those listed may be ordered.
Wattage
The maximum wattages listed are computed at 60 watts per square
inch of heated surface. With proper fit in a heat sink, long life can be
expected at this watt density. Consult factory for higher watt density applications. Lower watt density will result in longer life. Any
wattage within standard limits may be ordered without affecting
price.
Voltage
Standard voltages are either 120V or 240V (subject to limits above).
Lower voltages are available.
Termination
All units up to 15⁄16" diameter, within published amperage limits, are
manufactured with 6" (type SF1) leads, longer length leads are
available. Standard insulation on 1⁄4" units is Teflon (200ºC);
Fiberglass (250ºC) is standard on units 5⁄16" in diameter and larger. All
units 15⁄16" and larger are manufactured with post terminals (type
SF-3). Optional Type SF1 leads are available.
Stock units supplied with 12” leads.
Web: www.hotwatt.com
Tolerances
Wattage tolerances are held to +5%, -10% at rated voltage.
Diameter is always .001" less, but not more than .009" less, than the
nominal (fractional) heater diameter except for 1.90" and 23⁄8"
diameters. This sizing is maintained so that all units are a slide fit into
a standard reamed hole of the size ordered. Thermal action will
expand the unit to a snug fit for best heat conduction. If close hole
tolerances are not maintained, operating life may be drastically
reduced. See specific heater size for exact tolerances. Length
tolerances are ±2% with a 1⁄16" minimum. Consult factory for closer
tolerances.
How to Order
After determining the wattage required and the line voltage available, determine the physical space available for heaters and the
number of heaters required.
Review Stock lists for In-Stock Items.
Review Special Features, see page 22-27
Specify: catalog number, wattage, voltage, lead type, and special
features, if required.
Example: SC62-8.5/600W240V/SF1-16/SF14-10
Email: sales@hotwatt.com
9
Cartridge Heaters
U.L. Recongnized - E56973
C.S.A. Certified - LR - 016386-0-000
CARTRIDGE
Superwatt® High Watt Density
Applications:
Dies, Heat Sealing, Hot Melt Adhesive, Plastic Molding, Platens,
Shoe Machinery.
Features:
• Elements are designed for maximum: Watt density, temperature,
heat transfer and heater life.
• The useful life of a Cartridge heating element is determined by
how quickly the heat generated in the resistance wire can be
disappated to the outside sheath. With low and moderate watt
density elements, such as Hotwatt’s standard line, the conventional
method of inserting helical coils in formed ceramics is an entirely
satisfactory method of construction because the wire temperature
relative to sheath temperature, even though considerably higher,
is still well within safe long-life operating temperatures.
• The Superwatt® cartridge heater accelerates the transfer of heat
from the resistance wire to the sheath. This is accomplished by
relocating the wire so that it is closer to the sheath; and swaging
the outside diameter of the heater, thereby compressing the
magnesium oxide filler so that it becomes an improved conductor
of heat from the wire while maintaining its dielectric properties.
(See diagram this page). By improving the heat transfer rate, it is
possible to manufacture elements of higher densities because the
differential between the wire temperature and the sheath
temperature has been minimized.
Construction:
1 Heliarc welded end seal.
2 Series 300 stainless steel sheath of precision dimensions and
tolerances for intimate, stable, non-oxidizing contact with
cavities machined for them.
3
4
5
6
Pure magnesium oxide compressed to an optimum density for
best heat transfer and electrical insulation at elevated
temperatures.
Element wire situated in close proximity to outside surface for
maximum heat transfer and minimum internal temperature
while preserving good dielectric qualities.
Ceramic cap.
Fiberglass insulated leads.
• Long, trouble free service.
• Made in U.S.A.
1
10
2
3
Phone: 978-777-0070
4
Fax: 978-774-2409
5
6
Cartridge Heaters
Superwatt® High Watt Density
CARTRIDGE
▼ Manfactured Items ▼
Diameter:
Maximum Amperage:
⁄8" (.124/.120)
3.5 Not UL/CSA
1
Sheath
Length
Cat. No.
1"
11⁄2"
2"
HS12-1
HS12-1.5
HS12-2
Min.
Watts
Max.
Volts
Sheath
Length
Cat. No.
Min.
Watts
Max.
Volts
21⁄2"
3"
31⁄2"
4"
HS12-2.5
HS12-3
HS12-3.5
HS12-4
50
60
70
80
120
120
120
120
Consult
Factory
▼ Manfactured Items ▼
Diameter:
Maximum Amperage:
Sheath
Length
1"
11⁄2"
2"
21⁄2"
3"
31⁄2"
4"
41⁄2"
5"
51⁄2"
6"
61⁄2"
7"
71⁄2"
8"
81⁄2"
9"
91⁄2"
10"
101⁄2"
11"
111⁄2"
12"
⁄4" (.249/.245)
4
⁄8" (.374/.370)
6
1
Cat. No.
HS25-1
HS25-1.5
HS25-2
HS25-2.5
HS25-3
HS25-3.5
HS25-4
HS25-4.5
HS25-5
HS25-5.5
HS25-6
HS25-6.5
HS25-7
HS25-7.5
HS25-8
HS25-8.5
HS25-9
HS25-9.5
HS25-10
HS25-10.5
HS25-11
HS25-11.5
HS25-12
⁄2" (.499/.495)
10
3
Min.
Watts
Max.
Volts
70
70
100
130
150
180
210
240
260
290
320
350
380
410
440
470
500
530
560
590
620
650
680
120
120
120
120
240
240
240
240
240
240
240
240
240
240
240
240
240
240
240
240
240
240
240
Cat. No.
1
Min.
Watts
Max.
Volts
70
80
120
160
200
240
280
320
360
400
440
480
520
560
600
640
680
720
760
800
840
880
920
120
120
240
240
240
240
240
240
240
240
240
240
240
240
240
240
240
240
240
240
240
240
240
HS37-1
HS37-1.5
HS37-2
HS37-2.5
HS37-3
HS37-3.5
HS37-4
HS37-4.5
HS37-5
HS37-5.5
HS37-6
HS37-6.5
HS37-7
HS37-7.5
HS37-8
HS37-8.5
HS37-9
HS37-9.5
HS37-10
HS37-10.5
HS37-11
HS37-11.5
HS37-12
Cat. No.
Min.
Watts
Max.
Volts
HS50-1.5
HS50-2
HS50-2.5
HS50-3
HS50-3.5
HS50-4
HS50-4.5
HS50-5
HS50-5.5
HS50-6
HS50-6.5
HS50-7
HS50-7.5
HS50-8
HS50-8.5
HS50-9
HS50-9.5
HS50-10
HS50-10.5
HS50-11
HS50-11.5
HS50-12
110
160
210
270
330
380
430
490
550
600
650
700
750
800
850
900
950
1000
1050
1100
1150
1200
240
240
240
240
240
240
240
240
240
240
240
240
240
240
240
240
240
240
240
240
240
240
▼ IN STOCK ITEMS ▼
Diameter: 1⁄4" (continued)
Diameter: ⁄4"
1
Length
1"
11⁄4"
11⁄2"
11⁄2"
11⁄2"
2"
2"
2"
21⁄2"
21⁄2"
Cat.No.
HS25-1
HS25-1.25
HS25-1.5
HS25-1.5
HS25-1.5
HS25-2
HS25-2
HS25-2
HS25-2.5
HS25-2.5
Watts
Volts
100
100
70
100
120
100
150
200
135
185
120
120
120
120
120
120
120
240
120
120
Watt Approx.
Density Wght.
w/in.2
(lbs.)
250
165
85
125
150
85
125
173
85
115
.02
.02
.02
.02
.02
.03
.03
.03
.03
.03
Web: www.hotwatt.com
Length
Cat.No.
Watts
Volts
2 ⁄2"
21⁄2"
3"
3"
3"
3"
3"
31⁄2"
31⁄2"
31⁄2"
HS25-2.5
HS25-2.5
HS25-3
HS25-3
HS25-3
HS25-3
HS25-3
HS25-3.5
HS25-3.5
HS25-3.5
250
250
75
170
220
300
300
50
65
200
120
240
120
120
120
120
240
120
120
120
1
Email: sales@hotwatt.com
Watt Approx.
Density Wght.
w/in.2
(lbs.)
159
159
38
90
115
156
156
21
27
85
.03
.03
.04
.04
.04
.04
.04
.04
.04
.04
11
Cartridge Heaters
CARTRIDGE
Superwatt® High Watt Density
▼ IN STOCK ITEMS (Continued) ▼
Diameter: 3⁄8" (continued)
Diameter: ⁄4" (continued)
1
Length
3 ⁄2"
31⁄2"
31⁄2"
4"
4"
4"
4"
4"
4"
4"
4"
4"
41⁄2"
41⁄2"
41⁄2"
41⁄2"
41⁄2"
41⁄2"
5"
5"
5"
5"
5"
5"
6"
6"
6"
7"
7"
7"
1
Cat.No.
HS25-3.5
HS25-3.5
HS25-3.5
HS25-4
HS25-4
HS25-4
HS25-4
HS25-4
HS25-4
HS25-4
HS25-4
HS25-4
HS25-4.5
HS25-4.5
HS25-4.5
HS25-4.5
HS25-4.5
HS25-4.5
HS25-5
HS25-5
HS25-5
HS25-5
HS25-5
HS25-5
HS25-6
HS25-6
HS25-6
HS25-7
HS25-7
HS25-7
Watts
200
260
260
65
60
75
100
235
235
300
300
400
400
70
90
270
270
350
350
75
100
305
305
400
400
100
400
400
90
300
300
Volts
240
120
240
120
120
120
120
240
120
240
120
240
120
120
120
240
120
240
120
120
120
240
120
240
120
120
240
120
120
240
Watt Approx.
Density Wght.
w/in.2
(lbs.)
85
110
110
21
27
27
85
85
110
110
150
150
21
27
85
85
110
110
21
28
85
85
115
115
23
94
94
18
69
69
.04
.04
.04
.04
.04
.04
.04
.04
.04
.04
.04
.04
.05
.05
.05
.05
.05
.05
.06
.06
.06
.06
.06
.06
.06
.06
.06
.12
.12
.12
Diameter: 3⁄8"
Length
1"
11⁄4"
11⁄4"
11⁄2"
11⁄2"
11⁄2"
11⁄2"
11⁄2"
11⁄2"
11⁄2"
Cat.No.
HS37-1
HS37-1.25
HS37-1.25
HS37-1.5
HS37-1.5
HS37-1.5
HS37-1.5
HS37-1.5
HS37-1.5
HS37-1.5
Watts
Volts
100
100
150
25
50
100
100
150
200
200
120
120
120
120
120
120
240
120
120
240
Watt Approx.
Density Wght.
w/in.2
(lbs.)
165
110
165
22
26
90
90
125
105
105
.04
.04
.04
.05
.05
.05
.05
.05
.05
.05
Length
Cat.No.
Watts
Volts
2"
2"
2"
2"
2"
2"
2"
2"
2"
21⁄2"
21⁄2"
21⁄2"
21⁄2"
21⁄2"
21⁄2"
3"
3"
3"
3"
3"
3"
31⁄2"
31⁄2"
31⁄2"
31⁄2"
4"
4"
4"
4"
4"
4"
5"
5"
6"
6"
6"
91⁄2"
91⁄2"
10"
10"
12"
12"
HS37-2
HS37-2
HS37-2
HS37-2
HS37-2
HS37-2
HS37-2
HS37-2
HS37-2
HS37-2.5
HS37-2.5
HS37-2.5
HS37-2.5
HS37-2.5
HS37-2.5
HS37-3
HS37-3
HS37-3
HS37-3
HS37-3
HS37-3
HS37-3.5
HS37-3.5
HS37-3.5
HS37-3.5
HS37-4
HS37-4
HS37-4
HS37-4
HS37-4
HS37-4
HS37-5
HS37-5
HS37-6
HS37-6
HS37-6
HS37-9.5
HS37-9.5
HS37-10
HS37-10
HS37-12
HS37-12
40
50
60
150
150
200
200
250
250
50
75
200
200
300
300
60
100
250
250
400
400
75
300
450
300
90
125
350
350
500
500
125
500
150
600
600
250
1000
250
1000
250
1000
120
120
120
120
240
120
240
120
240
120
120
120
240
120
240
120
120
120
240
120
240
120
120
120
240
120
120
120
240
120
240
120
240
120
120
240
120
240
120
240
120
240
• Lengths longer than those listed may be ordered.
12
Phone: 978-777-0070
Fax: 978-774-2409
Watt Approx.
Density Wght.
w/in.2
(lbs.)
21
27
34
85
85
110
110
135
135
21
31
85
85
125
125
21
25
85
85
135
135
21
85
130
85
21
30
85
85
120
120
23
95
22
90
90
24
96
22
90
19
79
.06
.06
.06
.06
.06
.06
.06
.06
.06
.07
.07
.07
.07
.07
.07
.08
.08
.08
.08
.08
.08
.09
.09
.18
.09
.10
.10
.10
.10
.10
.10
.11
.11
.13
.13
.13
.19
.19
.20
.20
.22
.22
Cartridge Heaters
Superwatt® High Watt Density
Diameter: 1⁄2" (continued)
Diameter: ⁄2"
Length
Cat.No.
Watts
Volts
11⁄2"
11⁄2"
11⁄2"
11⁄2"
2"
2"
2"
2"
21⁄2"
21⁄2"
21⁄2"
21⁄2"
21⁄2"
21⁄2"
3"
3"
3"
3"
3"
HS50-1.5
HS50-1.5
HS50-1.5
HS50-1.5
HS50-2
HS50-2
HS50-2
HS50-2
HS50-2.5
HS50-2.5
HS50-2.5
HS50-2.5
HS50-2.5
HS50-2.5
HS50-3
HS50-3
HS50-3
HS50-3
HS50-3
35
135
135
335
50
200
200
400
70
120
270
270
470
470
85
135
335
335
535
120
120
240
120
120
120
240
120
120
120
120
240
120
240
120
120
120
240
120
Watt Approx.
Density Wght.
w/in.2
(lbs.)
21
85
85
210
21
85
85
165
21
37
85
85
150
150
21
34
85
85
135
.07
.07
.07
.07
.08
.08
.08
.08
.09
.09
.09
.09
.09
.09
.10
.10
.10
.10
.10
Length
Cat.No.
Watts
Volts
3"
4"
4"
4"
5"
5"
5"
6"
6"
6"
8"
8"
8"
10"
10"
12"
12"
14"
14"
HS50-3
HS50-4
HS50-4
HS50-4
HS50-5
HS50-5
HS50-5
HS50-6
HS50-6
HS50-6
HS50-8
HS50-8
HS50-8
HS50-10
HS50-10
HS50-12
HS50-12
HS50-14
HS50-14
535
120
470
470
125
500
500
185
735
735
250
1000
1000
300
1200
500
2000
575
2300
240
120
120
240
120
120
240
120
120
240
120
120
240
120
240
120
240
120
240
Watt Approx.
Density Wght.
w/in.2
(lbs.)
135
21
85
85
17
70
70
21
85
85
21
85
85
20
80
28
112
27
110
.10
.11
.11
.11
.13
.13
.13
.15
.15
.15
.17
.17
.17
.22
.22
.40
.40
.48
.48
CARTRIDGE
▼ IN STOCK ITEMS (Continued) ▼
1
▼ Manfactured Items ▼
Diameter:
Maximum Amperage:
Sheath
Length
11⁄2"
2”
21⁄2"
3"
31⁄2"
4"
41⁄2"
5”
51⁄2"
6”
61⁄2"
7”
71⁄2"
8”
81⁄2"
9"
91⁄2"
10”
101⁄2"
11”
111⁄2"
12”
14"
16”
18”
20”
⁄8" (.624/.620)
20
Min.
Cat. No. Watts
5
HS62-1.5
HS62-2
HS62-2.5
HS62-3
HS62-3.5
HS62-4
HS62-4.5
HS62-5
HS62-5.5
HS62-6
HS62-6.5
HS62-7
HS62-7.5
HS62-8
HS62-8.5
HS62-9
HS62-9.5
HS62-10
HS62-10.5
HS62-11
HS62-11.5
HS62-12
HS62-14
HS62-16
HS62-18
HS62-20
130
200
270
340
410
480
550
620
690
760
830
900
970
1040
1110
1180
1250
1320
1390
1460
1530
1600
1740
1880
2020
2090
⁄4" (.749/.745)
28
Min.
Cat. No. Watts
3
Max.
Volts
240
240
240
240
240
240
240
240
240
240
240
240
240
240
240
240
240
240
240
240
240
240
240
240
240
240
Web: www.hotwatt.com
HS75-2.5
HS75-3
HS75-3.5
HS75-4
HS75-4.5
HS75-5
HS75-5.5
HS75-6
HS75-6.5
HS75-7
HS75-7.5
HS75-8
HS75-8.5
HS75-9
HS75-9.5
HS75-10
HS75-10.5
HS75-11
HS75-11.5
HS75-12
HS75-14
HS75-16
HS75-18
HS75-20
330
410
495
575
660
740
825
910
980
1075
1150
1240
1325
1400
1475
1560
1645
1730
1820
1890
2050
2210
2370
2450
Max.
Volts
240
240
240
240
240
240
240
240
240
240
240
240
240
240
240
240
240
240
240
240
240
240
240
240
1" (.999/.993)
30
Min.
Cat. No. Watts
HS1.0-3
HS1.0-3.5
HS1.0-4
HS1.0-4.5
HS1.0-5
HS1.0-5.5
HS1.0-6
HS1.0-6.5
HS1.0-7
HS1.0-7.5
HS1.0-8
HS1.0-8.5
HS1.0-9
HS1.0-9.5
HS1.0-10
HS1.0-10.5
HS1.0-11
HS1.0-11.5
HS1.0-12
HS1.0-14
HS1.0-16
HS1.0-18
HS1.0-20
Email: sales@hotwatt.com
475
570
665
760
855
950
1045
1140
1235
1330
1425
1520
1615
1710
1805
1900
1995
2090
2185
2545
2920
3300
3675
Max.
Volts
240
240
240
240
240
240
240
240
240
240
240
240
240
240
240
240
240
240
240
240
240
240
240
13
Cartridge Heaters
CARTRIDGE
Superwatt® High Watt Density
14
▼ IN STOCK ITEMS ▼
Diameter: 5⁄8"
Diameter: 3⁄4"
Length
Cat.No.
Watts
Volts
2"
2"
2"
21⁄2"
21⁄2"
21⁄2"
3"
3"
3"
4"
4"
4"
6"
6"
6"
8"
8"
8"
8"
10"
10"
12"
12"
14"
14"
16"
16"
16"
16"
18"
18"
20"
20"
HS62-2
HS62-2
HS62-2
HS62-2.5
HS62-2.5
HS62-2.5
HS62-3
HS62-3
HS62-3
HS62-4
HS62-4
HS62-4
HS62-6
HS62-6
HS62-6
HS62-8
HS62-8
HS62-8
HS62-8
HS62-10
HS62-10
HS62-12
HS62-12
HS62-14
HS62-14
HS62-16
HS62-16
HS62-16
HS62-16
HS62-18
HS62-18
HS62-20
HS62-20
65
250
250
85
335
335
105
415
415
145
585
585
230
920
920
250
375
1000
1500
400
1600
435
1750
925
3700
625
1125
2500
4500
750
3000
875
3500
120
120
240
120
120
240
120
120
240
120
120
240
120
120
240
120
120
240
240
120
240
120
240
120
240
120
120
240
240
120
240
120
240
Watt Approx.
Density Wght.
w/in.2
(lbs.)
21
85
85
21
85
85
21
85
85
21
85
85
21
85
85
17
25
70
100
21
85
20
80
35
140
21
37
82
148
22
87
23
92
.13
.13
.13
.15
.15
.15
.17
.17
.17
.20
.20
.20
.30
.30
.30
.40
.40
.40
.40
.70
.70
.80
.80
.79
.79
.91
.91
.91
.91
1.03
1.03
1.25
1.25
Phone: 978-777-0070
Length
Cat.No.
Watts
Volts
6"
6"
6"
8"
8"
8"
8"
10"
10"
12"
12"
14"
14"
14"
16"
16"
18"
18"
HS75-6
HS75-6
HS75-6
HS75-8
HS75-8
HS75-8
HS75-8
HS75-10
HS75-10
HS75-12
HS75-12
HS75-14
HS75-14
HS75-14
HS75-16
HS75-16
HS75-18
HS75-18
250
1000
1500
375
500
1500
2000
500
2000
550
2200
1125
2500
4500
1125
4700
1250
5000
120
240
240
120
120
240
240
120
240
120
240
120
240
240
120
240
120
240
Fax: 978-774-2409
Watt Approx.
Density Wght.
w/in.2
(lbs.)
20
80
115
21
27
85
110
22
90
20
80
35
79
142
32
129
30
122
.44
.44
.44
.58
.58
.58
.58
.85
.85
1.00
1.00
1.03
1.03
1.03
1.14
1.14
1.25
1.25
Cartridge Heaters
Superwatt® High Watt Density
Fit
High watt density heaters require careful fit to insure optimum
performance and long life. Hotwatt recommends that installation
holes not be drilled and reamed over .002” or larger than the
nominal hole size required. The heaters are sized so that they never
exceed .005” less than the nominal diameter and always at least
.001” under the nominal diameter for a slide fit. These close fits
insure rapid heat transfer from the heater and also help keep the unit
as cool as possible, which contributes to long life. See chart A for
allowable watt densities at different fit tolerances and operating temperatures.
Graph A:
Maximum watts/sq. in. with various
increasing temperatures and hole tolerances.
1000
800
600
CARTRIDGE
Obtaining maximum heat transfer and long life.
500
400
300
200
Rapid cycling of heaters from very low to very high temperatures
shortens their life considerably. It is recommended therefore, that
care be taken to compute the correct wattage for any given
installation. Optimum wattage should result in a 50/50 off/on cycle.
For very high temperature operation (over 750ºF), off/on control
might well be replaced by input voltage regulation through variable
transformers or silicon rectifiers so that great temperature fluctuations
in the heater wire are minimized.
Watts per square inch
Cycling
20
0˚F
40
0˚F
100
60
0˚F
80
0˚F
80
60
100
0˚F
50
120
0˚F
40
30
140
0˚F
20
Location of temperature control point
Wattage
Minimum wattage is based on 60 watts per square inch. Units with
lower watt densities may be manufactured for special conditions
such as high temperature or vibration. Minimum wattage available
can be determined using the following formula and the values in
Table 1:
Voltage Squared
Minimum Watts =
Ohms/inch x Heated Length
.0
40
.0
50
.0
6
.0 0
70
.0
8
.0 0
90
.1
00
.0
30
.0
20
.0
04
.0
05
.0
06
.0
0
.0 7
08
.0
09
.0
10
.0
03
.0
02
10
.0
01
When thermostats are used, the sensing element ought not to be
placed further than 1⁄2" away from the heater wherever possible.
Location further away could conceivably cause the unit to run too hot
and thereby shorten life.
Hole size over nominal fractional size
The watt densities are based on a unit installed in mild steel.
Different materials affect the above values i.e. the lower the thermal
conductivity of the material, the lower the maximum allowable watts
per square inch.
Formula for determination of allowable element
wattage:
Element Wattage: 3.142 x Diameter x Heated Length x Maximum
watts/square inch from Graph A.
Formula for determination of watts/sq.in:
Unit Wattage
3.142 x Diameter x Heated Length
Heated Length is 1⁄2" less than sheath length
Watts/sq. in. =
Table 1: Maximum allowable Ohms per inch by diameter.
Superwatt
Diameter
1
⁄8"
1
⁄4"
3
⁄8"
1
⁄2"
5
⁄8"
3
⁄4"
1"
Maximum Ohms per Inch
of Heated Length
800
600
800
600
500
600
700
Voltage
Standard Voltage is either 120V or 240V. Other voltages are available.
Tolerances
Wattage tolerances is +5% -10% at rated voltage. Length tolerances
are ±2% with a ±1⁄16" minimum. Length tolerances apply to element
sheath length.
Camber tolerances for units up to 12" long is .005" per six inch
length. For units over 12" long, tolerance is .020" per foot of length.
This value varies as the square of the length in feet. (i.e.—a 36" unit
has a camber tolerance of .020" x (3)2 = .180"). Normally camber
does not present a problem since the unit will flex enough to fit a
straight, close fit hole.
How To Order
Termination
All units up to 1" diameter, within published amperage limits, are
manufactured with 6" (type SF1) leads. 1" diameter units are
manufactured with 6" (type SF2). Longer length leads are available.
Stock units supplied with 12” leads.
Web: www.hotwatt.com
After determining the wattage required and the line voltage
available: determine the physical space available for heaters and the
number of heaters required.
Review Stock List for In-Stock Items.
Specify: catalog number, wattage, voltage, lead type, and special
features if required.
Example: HS37-4.25/375W120V/SF1-18/SF26
Email: sales@hotwatt.com
15
Cartridge Heaters
CARTRIDGE
Metric Low to High Watt Density
▼ Manfactured Items ▼
Features:
• Both Standard (MS) and Superwatt® (MH) constructions are available.
• Wattages other than those listed are available.
• Made in U.S.A.
Diameter: 6 MM (5.87-5.97) Maximum Amp. 3.5
Length/mm Catalog No. Min.
Max.
Watts
Watts
40
50
60
70
80
90
100
110
120
130
140
150
MS6-40
MS6-50
MS6-60
MS6-70
MS6-80
MS6-90
MS6-100
MS6-110
MS6-120
MS6-130
MS6-140
MS6-150
10
10
10
10
10
10
10
10
10
10
10
10
30
40
50
60
70
80
90
100
110
120
130
140
Diameter: 6.5 MM (6.38-6.48) Max. Amps.MS3.5,MH4
Length/mm Catalog No. Min.
Max.
Watts
Watts
40
40
50
50
60
60
70
70
80
80
90
90
100
100
110
110
120
120
130
130
140
140
150
150
16
U.L. Recognized – E56973
C.S.A. Certified 016386-0-000
MS6.5-40
MH6.5-40
MS6.5-50
MH6.5-50
MS6.5-60
MH6.5-60
MS6.5-70
MH6.5-70
MS6.5-80
MH6.5-80
MS6.5-90
MH6.5-90
MS6.5-100
MH6.5-100
MS6.5-110
MH6.5-110
MS6.5-120
MH6.5-120
MS6.5-130
MH6.5-130
MS6.5-140
MH6.5-140
MS6.5-150
MH6.5-150
10
60
10
70
10
90
10
105
10
130
10
145
10
165
10
185
10
205
10
225
10
240
10
260
50
*
65
*
75
*
90
*
110
*
125
*
145
*
160
*
170
*
185
*
200
*
215
*
Phone: 978-777-0070
Diameter: 8 MM (7.87-7.98) Max. Amp. 6
Length/mm Catalog No. Min.
Max.
Watts
Watts
40
50
60
70
80
90
100
110
120
130
140
150
MS8-40
MS8-50
MS8-60
MS8-70
MS8-80
MS8-90
MS8-100
MS8-110
MS8-120
MS8-130
MS8-140
MS8-150
10
10
10
10
10
10
10
10
10
10
10
10
60
75
95
115
135
155
170
190
215
230
250
270
Diameter: 10 MM (9.85-9.96) Max. Amps.6
Length/mm Catalog No. Min.
Max.
Watts
Watts
40
40
50
50
60
60
70
70
80
80
90
90
100
100
110
110
120
120
130
130
140
140
150
150
160
160
170
170
180
180
MS10-40
MH10-40
MS10-50
MH10-50
MS10-60
MH10-60
MS10-70
MH10-70
MS10-80
MH10-80
MS10-90
MH10-90
MS10-100
MH10-100
MS10-110
MH10-110
MS10-120
MH10-120
MS10-130
MH10-130
MS10-140
MH10-140
MS10-150
MH10-150
MS10-160
MH10-160
MS10-170
MH10-170
MS10-180
MH10-180
Fax: 978-774-2409
10
75
10
105
10
135
10
165
10
195
10
225
10
255
10
285
10
315
10
345
10
370
10
400
10
430
10
460
10
490
65
*
90
*
115
*
135
*
165
*
190
*
210
*
235
*
260
*
285
*
310
*
335
*
355
*
380
*
405
*
Cartridge Heaters
Metric Low to High Watt Density
Diameter: 12 MM (11.86-11.96) Max. Amp. 6
Length/mm Catalog No. Min.
Max.
Watts
Watts
40
50
60
70
80
90
100
110
120
130
140
150
160
170
180
MS12-40
MS12-50
MS12-60
MS12-70
MS12-80
MS12-90
MS12-100
MS12-110
MS12-120
MS12-130
MS12-140
MS12-150
MS12-160
MS12-170
MS12-180
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
75
105
135
165
190
220
250
280
310
335
365
395
420
450
480
Diameter: 12.5 MM (12.34-12.47) Max. Amp.10
Length/mm Catalog No. Min.
Max.
Watts
Watts
40
40
50
50
60
60
70
70
80
80
90
90
100
100
110
110
120
120
130
130
140
140
150
150
160
160
170
170
180
180
MS12.5-40
MH12.5-40
MS12.5-50
MH12.5-50
MS12.5-60
MH12.5-60
MS12.5-70
MH12.5-70
MS12.5-80
MH12.5-80
MS12.5-90
MH12.5-90
MS12.5-100
MH12.5-100
MS12.5-110
MH12.5-110
MS12.5-120
MH12.5-120
MS12.5-130
MH12.5-130
MS12.5-140
MH12.5-140
MS12.5-150
MH12.5-150
MS12.5-160
MH12.5-160
MS12.5-170
MH12.5-170
MS12.5-180
MH12.5-180
10
100
10
135
10
175
10
210
10
245
10
285
10
325
10
355
10
390
10
430
10
465
10
500
10
535
10
575
10
605
85
*
115
*
145
*
175
*
205
*
235
*
265
*
295
*
335
*
350
*
385
*
415
*
445
*
475
*
500
*
Web: www.hotwatt.com
Diameter: 13 MM (12.85-12.98) Max. Amp.10
Length/mm Catalog No. Min.
Max.
Watts
Watts
40
50
60
70
80
90
100
110
120
130
140
150
160
170
180
190
200
MH13-40
MH13-50
MH13-60
MH13-70
MH13-80
MH13-90
MH13-100
MH13-110
MH13-120
MH13-130
MH13-140
MH13-150
MH13-160
MH13-170
MH13-180
MH13-190
MH13-200
105
140
180
215
255
295
330
370
405
445
480
520
560
600
635
675
710
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
CARTRIDGE
▼ Manfactured Items ▼
Diameter: 15 MM (14.86-14.99) Max. Amp.10
Length/mm Catalog No. Min.
Max.
Watts
Watts
40
50
60
70
80
90
100
110
120
130
140
150
160
170
180
190
200
MS15-40
MS15-50
MS15-60
MS15-70
MS15-80
MS15-90
MS15-100
MS15-110
MS15-120
MS15-130
MS15-140
MS15-150
MS15-160
MS15-170
MS15-180
MS15-190
MS15-200
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
90
135
170
205
245
275
315
350
390
425
460
500
535
570
605
640
670
* Maximum wattage is determined by heater fit and
operating temperature of the part to be heated using
the watt density formula and values from graph A on
page 15.
Email: sales@hotwatt.com
17
Cartridge Heaters
CARTRIDGE
Metric Low to High Watt Density
▼ Manfactured Items ▼
Diameter: 16 MM (15.82-15.95) Max. Amps.MS10, MH20
Length/mm Catalog No. Min.
Max.
Watts
Watts
40
40
50
50
60
60
70
70
80
80
90
90
100
100
110
110
120
120
130
130
140
140
150
150
160
160
170
170
180
180
190
190
200
200
MS16-40
MH16-40
MS16-50
MH16-50
MS16-60
MH16-60
MS16-70
MH16-70
MS16-80
MH16-80
MS16-90
MH16-90
MS16-100
MH16-100
MS16-110
MH16-110
MS16-120
MH16-120
MS16-130
MH16-130
MS16-140
MH16-140
MS16-150
MH16-150
MS16-160
MH16-160
MS16-170
MH16-170
MS16-180
MH16-180
MS16-190
MH16-190
MS16-200
MH16-200
10
130
10
175
10
220
10
270
10
315
10
360
10
410
10
455
10
500
10
550
10
595
10
640
10
690
10
735
10
780
10
830
10
875
105
*
140
*
180
*
220
*
260
*
300
*
335
*
375
*
415
*
450
*
490
*
530
*
570
*
605
*
645
*
680
*
720
*
Wattage
Wattages other than those listed are available. Consult factory.
Voltage
Standard voltages are either 120V or 240V. Other voltages are available.
Tolerances
Wattage tolerance is +5%, -10% at rated voltage.
Diameter is always .001" less, but not more than .009" less, than the
nominal (fractional) heater diameter.
Length tolerances are ±2% with a ±1/16" minimum. Should tighter
dimensions be required, Hotwatt can provide closer control.
18
Phone: 978-777-0070
Diameter: 17.5 MM (17.27-17.47) Max. Amp.15
Length/mm Catalog No. Min.
Max.
Watts
Watts
40
50
60
70
80
90
100
110
120
130
140
150
160
170
180
190
200
MS17.5-40
MS17.5-50
MS17.5-60
MS17.5-70
MS17.5-80
MS17.5-90
MS17.5-100
MS17.5-110
MS17.5-120
MS17.5-130
MS17.5-140
MS17.5-150
MS17.5-160
MS17.5-170
MS17.5-180
MS17.5-190
MS17.5-200
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
105
155
195
235
280
315
360
400
440
485
525
565
605
650
690
730
770
Diameter: 20 MM (19.76-19.96) Max. Amp.15
Length/mm Catalog No. Min.
Max.
Watts
Watts
40
50
60
70
80
90
100
110
120
130
140
150
160
170
180
190
200
MS20-40
MS20-50
MS20-60
MS20-70
MS20-80
MS20-90
MS20-100
MS20-110
MS20-120
MS20-130
MS20-140
MS20-150
MS20-160
MS20-170
MS20-180
MS20-190
MS20-200
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
120
180
225
275
320
365
420
465
515
560
610
660
705
755
800
840
900
* Maximum wattage is determined by heater fit and
operating temperature of the part to be heated using
the watt density formula and values from graph A on
page 15.
How to Order
After determining the wattage required and the line voltage available,
determine the physical space available for heaters and the numbers
of heaters required.
Review Special Features, see page 22-27.
Specify: catalog number, wattage, voltage, lead length and special
features required.
Example: MS17.5-110/400W220V/SF1-6.
Fax: 978-774-2409
Cartridge Heaters
Square and Rectangular Low to Medium Watt Density
CARTRIDGE
U.L. Recognized – E56973
C.S.A. Certified 016386-0-000
Features:
• The Hotwatt Square and Rectangular Cartridge Heater is designed
to distribute maximum heat within a desired area. Because they are
completely enclosed, square units will furnish more usable heat for
a given wattage than a comparable strip heater attached to the
exterior of a mold, platen or other equipment.
• The units are inserted in a milled slot, permitting greater lengths
than would be feasible with a drilled or reamed hole. Close
dimensional tolerances are held to permit intimate fit for best
transfer to surrounding medium.
• Heating elements arranged just beneath outside surface for maximum
heat transfer, minimum wire temperature, and faster heating.
• Maximum surface temperatures up to 1200˚F (649ºC).
Designations are etched on the sheath to presrve accurate shape.
• Long, trouble free service.
• Made in U.S.A.
1 2
3
Web: www.hotwatt.com
4
Construction:
1 Sealed end.
2 Mica.
3 Series 300 stainless
steel sheath for non-oxidizing, stable
service with cavities machined for them.
4
5
6
7
Element wire situated in close proximity to outside surface for
maximum heat transfer, minimum wire temperature and faster
heating.
Magnesium oxide packing.
Ceramic element support.
Teflon insulated leads: 1⁄4" square.
Fiberglass insulated leads: 3⁄8" to 1⁄2" square, 1⁄4" x 5⁄8" and 1⁄4" x
1" rectangular.
5
6
Email: sales@hotwatt.com
7
19
Cartridge Heaters
CARTRIDGE
Square—Low to Medium Watt Density
▼ Manfactured Items ▼
Square
Size:
Maximum Amperage:
⁄8" x 1⁄8" (.124/.120 x .124/.120)
1 Not UL/CSA
⁄16" x 3⁄16" (.186/.183 x .186/.183)
3.5
1
3
Sheath
Length
Cat. No.
Min.
Watts
Max.
Watts
Cat. No.
Min.
Watts
Max.
Watts
1"
2"
3"
4"
5"
6"
7"
8"
9"
10"
11"
12"
SS12-1
SS12-2
SS12-3
SS12-4
SS12-5
SS12-6
SS12-7
SS12-8
SS12-9
SS12-10
SS12-11
SS12-12
10
10
10
10
10
10
10
10
10
10
10
10
15
35
55
75
95
115
135
155
175
195
215
235
SS18-1
SS18-2
SS18-3
SS18-4
SS18-5
SS18-6
SS18-7
SS18-8
SS18-9
SS18-10
SS18-11
SS18-12
10
10
10
10
10
10
10
10
10
10
10
10
20
45
70
105
130
160
195
230
250
270
295
320
For longer lengths,
compute wattage at:
10 watts per linear 1⁄2"
12 watts per linear 1⁄2"
• Lengths longer than those listed may be ordered.
Square
Size:
Maximum Amperage:
1
⁄4" (.249/.245 x .249/.245)
3.5
3
⁄8" (.374/.370 x .374/.370)
6
⁄2" (.499/.495 x .499/.495)
10
1
Sheath
Length
Cat. No.
Min.
Watts
Max.
Watts
Cat. No.
Min.
Watts
Max.
Watts
Cat. No.
Min.
Watts
Max.
Watts
2"
3"
4"
6"
8"
10"
12"
16"
18"
24"
SS25-2
SS25-3
SS25-4
SS25-6
SS25-8
SS25-10
SS25-12
SS25-16
SS25-18
SS25-24
10
10
10
10
10
10
10
10
10
10
60
100
150
225
350
450
550
750
840
840
SS37-2
SS37-3
SS37-4
SS37-6
SS37-8
SS37-10
SS37-12
SS37-16
SS37-18
SS37-24
10
10
10
10
10
10
10
10
10
10
90
150
210
330
450
570
690
930
1050
1410
SS50-2
SS50-3
SS50-4
SS50-6
SS50-8
SS50-10
SS50-12
SS50-16
SS50-18
SS50-24
10
10
10
10
10
10
10
10
10
10
130
210
300
500
700
850
1000
1280
1440
1920
For longer lengths,
compute wattage at:
840 watts max.
30 watts per linear 1⁄2"
40 watts per linear 1⁄2"
• Lengths longer than those listed may be ordered.
Wattage
Voltage
Minimum Wattage
The following table should be used to determine the allowable
voltage for low wattage miniature elements:
Standard voltage is either 120V or 240V. Other voltages are available.
Size:
Length
⁄8" Square
⁄16" Square
30v 60v 120v 230v 30v 60v 120v 230v
1"
11⁄2"
2"
.6w
.6w
.5w
All units within published amperage limits are manufactured with 6"
(type SF1) leads; longer length leads are available. Standard insulation
on 1⁄4" square units is Teflon (200ºC). Fiberglass (250ºC) is standard
on all other sizes.
1
2.5w 10w
2.5w 10w
2w 8w
3
NA
NA
27w
.8w 3w 12w
.5w 2w 8w
.4w 1.5w 6w
NA
30w
22w
Termination
NA = Not Available
20
Phone: 978-777-0070
Fax: 978-774-2409
Cartridge Heaters
Rectangular—Low to Medium Watt Density
CARTRIDGE
▼ Manfactured Items ▼
Rectangular
Size:
Maximum Amperage:
⁄8" x 1⁄4" (.124/.120 x .249/.245)
2
1
⁄8" x 3⁄8" (.124/.120 x .374/.370)
3.5
1
Sheath
Length
Cat. No.
Min.
Watts
Max.
Watts
Cat. No.
Min.
Watts
Max.
Watts
1"
2"
3"
4"
5"
6"
7"
8"
9"
10"
11"
12"
SR14-1
SR14-2
SR14-3
SR14-4
SR14-5
SR14-6
SR14-7
SR14-8
SR14-9
SR14-10
SR14-11
SR14-12
10
10
10
10
10
10
10
10
10
10
10
10
20
55
85
110
135
170
200
230
260
290
320
350
SR13-1
SR13-2
SR13-3
SR13-4
SR13-5
SR13-6
SR13-7
SR13-8
SR13-9
SR13-10
SR13-11
SR13-12
10
10
10
10
10
10
10
10
10
10
10
10
35
90
140
190
240
290
340
390
440
490
540
590
For longer lengths,
compute wattage at:
15 watts per linear 1⁄2"
25 watts per linear 1⁄2"
• Lengths longer than those listed may be ordered.
Rectangular
Size:
Maximum Amperage:
Sheath
Length
1"
2"
3"
4"
5"
6"
7"
8"
9"
10"
11"
12"
16"
18"
24"
For longer lengths,
compute wattage at:
⁄4" x 5⁄8" (.249/.245 x .624/.620)
6
Min.
Max.
Cat. No. Watts Watts
⁄4" x 1" (.249/.245 x .999/.993)
10
Min.
Max.
Cat. No. Watts Watts
SR15-1
SR15-2
SR15-3
SR15-4
SR15-5
SR15-6
SR15-7
SR15-8
SR15-9
SR15-10
SR15-11
SR15-12
SR15-16
SR15-18
SR15-24
SR16-1
SR16-2
SR16-3
SR16-4
SR16-5
SR16-6
SR16-7
SR16-8
SR16-9
SR16-10
SR16-11
SR16-12
SR16-16
SR16-18
SR16-24
1
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
35
100
175
250
320
455
560
640
720
800
880
960
1280
1440
1440
1920
35 watts per linear 1⁄2"
1
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
50
150
300
400
500
600
700
800
900
1000
1100
1200
1600
1800
2400
50 watts per linear 1⁄2"
• Lengths longer than those listed may be ordered.
Tolerances
How to Order
Wattage tolerances are held to +5%, -10% at rated voltage. Width
and height are always .001" less but not more than .010" less than the
nominal (fractional) heater size; length tolerances are ±2% with a ±1⁄16"
minimum. This sizing is maintained so that all units are a slide fit into
a standard milled slot of the size required. Thermal action will expand
the unit to a snug fit for best heat conduction.
After determining the wattage required and the line voltage available,
determine the physical space available for heaters and the numbers
of heaters required.
Review Special Features, see page 22-27.
Specify: catalog number, wattage, voltage, lead length and special
features required.
Example: SR16-7.5/750W240V/SF1-48
Web: www.hotwatt.com
Email: sales@hotwatt.com
21
Cartridge Heaters
CARTRIDGE
Special Features
Electric Heater Special Features and
Modifications
SF4: Leads for application where lead space is minimum and it is
desirable to bring leads out at right angles to sheath. Specify
overall length of heater when ordering.
The following is an outline of Special Features and Modifications
available with Hotwatt Electric Heating Elements. It applies to all
Standard, Superwatt, Square and Rectangular Cartridge Heaters
and Immersion Heaters. Catalog Numbers have been assigned to all
special features and modifications. Please provide an adequate
description to avoid confusion when a special feature applies to
more than one size or item. Special features for other heaters are
covered in each specific section.
Lead Configurations
SF1: Flexible leads for applications where leads can be bent close to
end of unit. See specific unit size for maximum allowable amperage.
Available on:
• Standard Cartridge: 3⁄16" to 3⁄4" diameter.
• Superwatt Cartridge: 1⁄4" to 3⁄4" diameter.
• Square and Rectangle Cartridge: All sizes.
Standard on:
• In-Stock Standard and Superwatt Cartridge.
• Standard Cartridge: 1⁄8" to 3⁄4" and 1.9" and 23⁄8" diameter.
• Superwatt Cartridge: 1⁄4" to 3⁄4" diameter.
• Square and Rectangular: all sizes.
• Immersion: 1⁄4" to 3⁄4" and 1.9", and 23⁄8" diameter.
SF5: Lead spring protector. Leads reinforced with steel spring for
applications where excessive flexing is encountered. Standard
spring length is 1" on 1⁄4" to 1⁄2" diameters and 11⁄2" on 5⁄8" to 3⁄4"
diameters. Longer spring lengths are available. Consult factory.
Available on:
• Standard Cartridge: 15⁄16" to 11⁄4" diameter.
• Immersion: 1" and 11⁄4" diameters.
SF2: Leads for application where repairable leads are desired or
when unit amperage will not allow the use of Type SF-1 leads.
Cat. No.
Standard on:
• Superwatt Cartridge: 1" diameter.
Available on:
• Standard Cartridge: 3⁄16" to 3⁄4 " diameter.
• Immersion: 1⁄4" to 3⁄4" diameter.
SF3: Post terminals.
SF5A
SF5B
SF5C
SF5D
SF5E
Unit Dia.
⁄4"
⁄8"
1
⁄2"
5
⁄8"
3
⁄4"
A
B
⁄4"
⁄4"
1
⁄4"
1
⁄2"
1
⁄2"
1"
1"
1"
11⁄2"
11⁄2"
1
1
3
1
Available on:
• Standard Cartridge: 1⁄4" to 3⁄4" diameter.
• Superwatt Cartridge: 1⁄4" to 3⁄4" diameter.
SF6: Ground wire.
Available on:
• All products.
Standard on:
• Standard Cartridge: 15⁄16" to 11⁄4" diameter.
• Immersion: 1" to 11⁄4" diameter.
Available on:
• Standard Cartridge: 3⁄4" diameter.
• Immersion: 3⁄4" diameter.
22
SF7: Fiberglass sleeving. Additional sleeving over leads for
protection. Leads are normally 2" longer than sleeve.
SF7A: Common sleeve. Single sleeve over both leads.
SF7B: Individual sleeve. Single sleeve over each lead. Specify length
of sleeve.
Available on:
• All products.
Phone: 978-777-0070
Fax: 978-774-2409
Cartridge Heaters
Special Features
SF12: Male dead front armored plug. May be mounted
directly to heater.
SF8A: Common sleeve. Single sleeve over both leads.
Available on:
• Products with leads. Consult factory for availability.
• Ground wire (SF6) should be specified when using any 3 prong plug.
SF8B: Individual sleeve. Single sleeve over each lead. Specify length
of sleeve. Leads are normally 2" longer than sleeve.
Available on:
• All products with leads.
SF9: Strain relief clip for leads subject to strain and pull.
SF12-P1: 2 prong/straight blade/2 pole/2wire/
UL&CSA Listed/NEMA 1-15P/125 volts/15 amps.
CARTRIDGE
SF8: Silicone rubber sleeving. Additional sleeving over leads for
protection and moisture resistance.
SF12-P2: 2 prong/twist lock/2 pole/2 wire/UL Listed/
NEMA L1-15P/125 volts/15 amps.
Available on:
• Standard Cartridge: 1⁄4" to 3⁄4" diameter with Type SF1 leads only.
• Superwatt Cartridge: 1⁄4" to 3⁄4" diameter with Type SF1 leads only.
SF10: Ceramic bead insulation for leads subject to high temperatures
up to 1000ºF. Specify lengths of beads required when ordering.
Available on:
• All products with leads.
SF12-P3: 3 prong/twist lock/2 pole/3 wire/
UL&CSA Listed/NEMA L6-15P/250 volts/15 amps.
SF12-P4: 3 prong/twist lock/2 pole/3 wire/
UL &CSA Listed/NEMA L6-20/250 volts/20 amps.
SF12-P5: 3 prong/straight blade/2 pole/3 wire/
UL&CSA Listed/NEMA 5-15P/125 volts/20 amps.
Lead End Termination
SF11: Lugs, rings, quick connect terminals attached to the end of
lead wires. Specify terminal type and size when ordering. Special
terminals are available.
SF13: Enclosures for protection of electrical connections.
SF13A: General purpose box. NEMA No. 1. 23⁄4" x 11⁄2" x 11⁄2".
Available on:
• All products with leads.
SF11A: Ring terminals. Specify size: #6, #8, #10.
SF11B: Straight quick connect terminals. Specify male or female
and size: 3⁄16" or 1⁄4".
SF11C: Flag quick connect terminals. Specify male or female
and size: 3⁄16" or 1⁄4".
Available on:
• Standard Cartridge: 3⁄8" to 1" diameter.
• Superwatt Cartridge: 3⁄8" to 1" diameter.
SF11D: Spade terminals. Specify size: #6, #8, #10.
Web: www.hotwatt.com
Email: sales@hotwatt.com
23
Cartridge Heaters
CARTRIDGE
Special Features
SF13B: Moisture resistant box. Mounted on NPT fitting.
Lead Protection
SF14: Flexible, stainless steel conduit for straight leads.
Available on:
• Standard Cartridge: 3⁄8" to 11⁄4" diameter.
• Superwatt Cartridge: 3⁄8" to 1" diameter.
SF13C: Explosion resistant box. Mounted on NPT fitting.
Available on:
• All products with leads: 3⁄16" to 11⁄4" diameter.
SF15: Flexible, stainless steel conduit for right angle leads.
Available on:
• Standard Cartridge: 3⁄8" to 11⁄4" diameter.
• Superwatt Cartridge: 3⁄8" to 1" diameter.
SF13D: General purpose box. NEMA No. 1. Rust resistant steel. 4"
octagonal.
Standard Conduit Sizes
Unit Size
Conduit O.D.
⁄16"- ⁄4"
3
⁄8"
1
⁄2"-5⁄8"
3
⁄4" & up
.244
.350
.381
.500
3
1
Min. Bend Diam.
nominal
nominal
nominal
nominal
1.31"
1.93"
2.12"
2.25"
inside
inside
inside
inside
Available on:
• Standard Cartridge: 3⁄16" to 11⁄4" diameter.
• Superwatt Cartridge: 1⁄4" to 1" diameter.
• Square Cartridge: 1⁄4" to 1⁄2" diameter.
SF16: Stainless steel, flexible braid for straight leads. Specify braid
length. Lengths are supplied 6" longer than braid.
Available on:
• Standard Cartridge:11⁄4" to 23⁄8" diameter.
Available on:
• Standard Cartridge: 3⁄8" to 3⁄4" diameter.
• Superwatt Cartridge: 3⁄8" to 3⁄4" diameter.
• Square and Rectangular: 3⁄8" and 1⁄2" square.
(1⁄4" x 5⁄8" and 1⁄4" x 1" rectangular).
24
Phone: 978-777-0070
Fax: 978-774-2409
Cartridge Heaters
Special Features
Available on:
• Standard Cartridge: 3⁄8" to 11⁄4" diameter.
• Superwatt Cartridge: 3⁄8" to 1" diameter.
• Square Cartridge: 3⁄8" and 1⁄2" square.
• Immersion Heater: 3⁄8" to 11⁄4" diameter.
SF18: Right angle convoluted bronze tubing.
SF21: Epoxy potting for moisture proof applications to 265ºF (129ºC)
in potting area.
CARTRIDGE
SF17: Convoluted bronze tubing. Flexible sealed tubing for
waterproof leads. Specify tubing length.
Available on:
• Standard Cartridge: 1⁄4" to 23⁄8" diameter.
• Superwatt Cartridge: 1⁄4" to 1" diameter.
• Square and Rectangular: All sizes except 1⁄8" square.
• Immersion Heater: All sizes.
SF22: Teflon end seal for moisture applications to 400ºF (204ºC).
Available on:
• Standard Cartridge: 1⁄8" to 3⁄4" diameter.
• Superwatt Cartridge: 1⁄4" to 3⁄4" diameter.
SF23: Ceramic to metal seals for hermetic sealing and vacuum
applications to 1000ºF (538ºC).
Available on:
• Standard Cartridge: 3⁄8" to 3⁄4" diameter.
• Superwatt Cartridge: 3⁄8" to 3⁄4" diameter.
• Square Cartridge: 3⁄8" and 1⁄2" square.
SF19: Straight solid copper extension. Specify length when ordering.
Leads are 6" longer than tubing.
Available on:
• Standard Cartridge: 3⁄8" to 3⁄4" diameter.
• Superwatt Cartridge: 3⁄8" to 3⁄4" diameter.
• Immersion Heater: 3⁄8" to 3⁄4" diameter.
Available on:
• Standard Cartridge: 1⁄4" to 3⁄4" diameter.
• Superwatt Cartridge: 1⁄4" and 3⁄4" diameter.
Sealing and Potting Lead End for
Adverse Environmental Conditions
SF20: Silicon rubber potting for moisture proof application to 400ºF
(204 ºC) in potting area. Silicon rubber sleeving must be used in conjunction with potting. See special Feature SF-8.
SF23: Table of Dimensions
Cat. No. Unit Diameter
Available on:
• Standard Cartridge: 3⁄16" to 23⁄8" diameter.
• Superwatt Cartridge: 1⁄4" to 1" diameter.
• Square and Rectangular: All sizes except 1⁄8" square.
• Immersion Heater: All sizes.
Web: www.hotwatt.com
SF23-A
SF23-B
SF23-C
SF23-D
A
B
C
D
⁄8"
1
⁄2"
5
⁄8"
3
⁄4"
.148"
.180"
.238"
.304"
⁄2"
17
⁄32"
9
⁄16"
19
⁄32"
1"
15⁄32"
13⁄16"
17⁄32"
3
Email: sales@hotwatt.com
1
25
Cartridge Heaters
CARTRIDGE
Special Features
Attaching Fittings
SF27: Stainless steel riser and support feet for over the side
immersion heaters.
SF25: Units with pipe bushing.
Standard Bushing
Coupling Bushing
Special Electrical Features
SF28: Three phase heaters.
Pipe
Thread
Heater
NPT
O.D.
Size
⁄4"
⁄8"
1
⁄2"
5
⁄8"
3
⁄4"
15
⁄16" & 1"
11⁄4"
1.9"
23⁄8"
1
3
⁄8"
⁄4"
3
⁄8"
1
⁄2"
3
⁄4"
1"
11⁄4"
2"
21⁄2"
1
1
A
B
C
D
AF
⁄8"
⁄8"
3
⁄16"
3
⁄16"
1
⁄4"
1
⁄4"
5
⁄16"
9
⁄16"
5
⁄8"
⁄2"
⁄16"
5
⁄8"
3
⁄4"
7
⁄8"
15
⁄16"
11⁄32"
17⁄16"
13⁄4"
⁄16"
⁄16"
1
⁄4"
1
⁄4"
3
⁄8"
1
⁄2"
1
⁄2"
NA
NA
⁄16"
1 ⁄16"
11⁄8"
13⁄8"
15⁄8"
17⁄8"
115⁄16"
NA
NA
⁄16"
⁄8"
11
⁄16"
7
⁄8"
11⁄8"
13⁄8"
13⁄4"
21⁄2"
3"
1
1
1
9
3
3
15
1
7
5
Available on:
• Standard Cartridge: 3⁄8" to 23⁄8" diameter.
• Superwatt Cartridge: 3⁄8" to 1" diameter.
• Immersion Heater: 3⁄8" to 23⁄8" diameter.
• Square Cartridge: 3⁄8" to 1⁄2" square.
SF29: Multiple heat; when a single unit with multiple wattages is
necessary. Some uses of these units include: quick heat-up with a standby
circuit for maintenance of low temperature; providing different
wattages when there is a wide variation in thermal loads; and replacing
more expensive rheostats or powerstats for wattage control.
Brass Bushings
SF25A: Single Brass.
SF25B: Coupling Brass.
Stainless Steel Bushings
SF25C: Single Stainless Steel.
SF25D: Coupling Stainless Steel.
Available on:
• Standard Cartridge: 1⁄4" to 23⁄8" diameter.
• Superwatt Cartridge: 1⁄4" to 1" diameter.
SF26: Units with flanges. Mounting hold centers for 1⁄4" to 5⁄8"
diameter is 11⁄8" and for 3⁄4" diameter is 15⁄32". Special flange sizes
available upon request.
Available on:
• Standard Cartridge: 3⁄8" to 23⁄8" diameter.
• Superwatt Cartridge: 3⁄8" to 1" diameter.
• Immersion Heater: 3⁄8" to 23⁄8" diameter.
• Square Cartridge: 3⁄8" to 1⁄2" square.
SF30: Special wattage distribution for units requiring different
concentrations of wattage over their heated length. Distribution
should be specified as a percentage of wattage over a percentage
of length, i.e. 36⁄25.
Available on:
• All units over 3" long.
Available on:
• Standard Cartridge: 1⁄4" to 3⁄4" diameter.
• Superwatt Cartridge: 1⁄4" to 3⁄4" diameter.
26
Phone: 978-777-0070
Fax: 978-774-2409
Cartridge Heaters
Special Features
SF37: Special alloy sheathing. Consult factory for availability before
ordering.
SF37A: 347 Stainless Steel.
SF37B: 321 Stainless Steel.
Grounded thermocouple:
• SF31-JG - Iron/Constantan - Type J
• SF31-KG - Chromel/Alumel - Type K
SF37C: Inconel.
SF37D: Titanium.
Available on:
• Standard Cartridge: 1⁄4" to 11⁄4" diameter.
• Immersion Heater: All sizes.
CARTRIDGE
SF31: Built in thermocouple. Junction at bottom of heater.
Ungrounded thermocouple:
• SF31-JU - Iron/Constantan - Type J
• SF31-KU - Chromel/Alumel - Type K
SF38: Passivated finish for corrosion resistance.
Available on:
• Standard Cartridge: 3⁄8" to 23⁄8" diameter.
• Superwatt Cartridge: 1⁄4" to 1" diameter.
• Square Cartridge: 3⁄8" to 1⁄2" square.
• Rectangular Cartridge: 1⁄4" by 1" rectangular.
• Immersion Heater: 3⁄8" to 23⁄8" diameter.
Available on:
• All Immersion Heaters.
SF39: Teflon coating for corrosive conditions. Termination must be
type SF2 or SF3.
SF32: High voltage heaters from 300V to 600V. Consult factory for
availability on items.
Maximum Voltage/Unit Size
Diameter
Std. Cart.
Superwatt
Immersion
⁄8"
5
480V
480V
480V
⁄4"
1”
11⁄4"
1.90"
23⁄8"
480V
480V
480V
480V
480V
480V
600V
NA
600V
600V
NA
600V
600V
NA
600V
3
Available on:
• Standard Cartridge: 3⁄16" to 11⁄4" diameter.
• Square or Rectangular: All sizes (except 1⁄8" square).
• Immersion Heater: All sizes.
Other Physical Features
SF33: Double end units. One terminal at end. Especially suitable for
heating: warming closets, ovens, press heads, drying cabinets,
platens and plates. Double end units (post type terminals at each
end) can be installed in reamed holes or in machined grooves. The
standard sheath material is stainless steel and cannot be bent or
formed. Available with SF1 or SF3 terminations.
Available on:
• Standard Cartridge: 3⁄8" to 3⁄4" and 11⁄4" diameter.
• Square Cartridge: 1⁄2" square only.
SF34: Odd sizes: 7⁄16", 9⁄16", 11⁄16", 13⁄16", and 7⁄8" diameter. Stainless steel
sheath.
Available on:
• Standard cartridge construction only.
SF36: Centerless ground on diameter for precision fit. Termination
must be Type SF2 or SF3. Tolerance on diameter ±.0005.
Available on:
• Standard Cartridge: 1⁄4" to 11⁄4" diameter.
• Superwatt Cartridge: 1⁄4" to 1" diameter.
Finished diameters after grinding will be:
⁄4"
⁄8"
1
⁄2"
5
⁄8"
1
3
=
=
=
=
.2450
.3700
.4950
.6200
3
⁄4" = .7430
⁄16" = .9300
1" = .9930
11⁄4" =1.240
15
Web: www.hotwatt.com
Email: sales@hotwatt.com
27
Cartridge Heaters
U.L. Recognized-E56973
C.S.A. Certified – 016386-0-000
IMMERSION
Immersion
Features:
• The Hotwatt Immersion Heater may be supplied with various
junction boxes for additional terminal or lead protection.
• For corrosive environments, units can be supplied in other special
alloys best suited to the operating conditions.
• The lead end of the unit may be sealed for extreme environmental
conditions.
Construction:
1 Welded end.
2 Mica.
3 Magnesium oxide packing.
4 Element wire situated in close proximity to outside surface for
maximum heat transfer and minimum internal temperature
while preserving good dielectric qualities.
• Units may be supplied for three phase or three heat operation.
• Made in U.S.A.
28
5
6
7
8
Phone: 978-777-0070
Series 316 stainless steel sheath.
Mounting bushing.
Ceramic cap.
Flexible stranded nickel alloy insulated leads or rust resistant
post terminals.
Fax: 978-774-2409
Cartridge Heaters
Immersion
IMMERSION
Available Bushings: Must be specified after catalog number.
after catalog number.
Stainless Steel Bushings
Brass Bushings
SF25C: Single
SF25A: Single
SF25D: Coupling Head
SF25B: Coupling Head
▼ Manfactured Items ▼
⁄4" Diameter
1
⁄8" Diameter
3
NPT Size: ⁄8"
Standard Termination: 6" Leads (SF1-6)
Maximum Amperage: 3.5
AF: 7⁄16"
C: 1⁄2"
D: 3⁄8"
1
NPT Size: 1⁄4"
Standard Termination: 6" Leads (SF1-6)
Maximum Amperage: 6.0
AF: 5⁄8"
C: 9⁄16"
D: 7⁄16"
Length
A
Catalog
Number
Maximum Wattage
in Water
Length
A
Catalog
Number
Maximum Wattage
in Water
2"
3"
4"
5"
6"
7"
EM25-2
EM25-3
EM25-4
EM25-5
EM25-6
EM25-7
115
185
255
325
395
465
2"
3"
4"
5"
6"
7"
EM37-2
EM37-3
EM37-4
EM37-5
EM37-6
EM37-7
130
240
345
450
555
660
Web: www.hotwatt.com
Email: sales@hotwatt.com
29
Cartridge Heaters
Immersion
▼ Manfactured Items ▼
IMMERSION
⁄2" Diameter
⁄8" Diameter
1
5
NPT Size: 3⁄8"
Standard Termination: 6" Leads (SF1-6)
Maximum Amperage: 10
AF: 11⁄16" C: 5⁄8" D: 7⁄16"
Length
Catalog
A
Number
NPT Size: 1⁄2"
Standard Termination: 6" Leads (SF1-6)
Maximum Amperage: 10
AF: 7⁄8" C: 3⁄4" D: 9⁄16"
Length
Catalog
A
Number
3"
4"
5"
6"
7"
8"
EM50-3
EM50-4
EM50-5
EM50-6
EM50-7
EM50-8
Maximum Wattage
in Water
360
505
635
765
895
1030
⁄4" Diameter
NPT Size: ⁄4"
Standard Termination: 6" Leads (SF1-6)
Maximum Amperage: 15
AF: 11⁄8" C: 7⁄8" D: 5⁄8"
Length
Catalog
A
Number
3
EM75-4
EM75-5
EM75-6
EM75-7
EM75-8
EM75-9
Maximum Wattage
in Water
705
915
1130
1340
1555
1765
5"
6"
7"
8"
9"
10"
EM1.0-5
EM1.0-6
EM1.0-7
EM1.0-8
EM1.0-9
EM1.0-10
1.9" Diameter
NPT Size: 11⁄4"
Standard Termination: 8-32 Screw and Nut (SF3)
Maximum Amperage: 30
AF: 13⁄4" C: 11⁄32" D: 23⁄32"
Length
Catalog
Maximum Wattage
A
Number
in Water
NPT Size: 2"
Standard Termination: 6" Leads (SF1-6)
Maximum Amperage: 40
AF: 21⁄2" C: 17⁄16" D: 11⁄16"
Length
Catalog
A
Number
EM1.2-6
EM1.2-7
EM1.2-8
EM1.2-10
EM1.2-12
EM1.2-14
1690
2145
2600
3055
3505
3960
2.3" Diameter
NPT Size: 2 ⁄2"
Standard Termination: 6" Leads (SF1-6)
Maximum Amperage: 50
AF: 3" C: 13⁄4" D: 7⁄8"
Length
Catalog
A
Number
EM2.3-12
EM2.3-18
EM2.3-24
EM2.3-30
EM2.3-36
EM2.3-42
10"
12"
16"
20"
24"
30"
EM1.9-10
EM1.9-12
EM1.9-16
EM1.9-20
EM1.9-24
EM1.9-30
1195
1495
1795
2095
2395
2695
Maximum Wattage
in Water
4200
5000
6700
8400
10000
12600
• Above wattages are based on a unit operating immersed in water.
For heating other materials, see table for recommended
maximum watt densities.
1
12"
18"
24"
30"
36"
42"
430
605
785
1060
1135
1310
NPT Size: 1"
Standard Termination: 8-32 Screw and Nut (SF3)
Maximum Amperage: 25
AF: 13⁄8" C: 15⁄16" D: 11⁄16"
Length
Catalog
Maximum Wattage
A
Number
in Water
11⁄4" Diameter
6"
7"
8"
10"
12"
14"
30
EM62-3
EM62-4
EM62-5
EM62-6
EM62-7
EM62-8
1" Diameter
3
4"
5"
6"
7"
8"
9"
3"
4"
5"
6"
7"
8"
Maximum Wattage
in Water
• Lengths between and longer than those listed may be ordered.
Maximum Wattage
in Water
• See page 148 for Suggested Watt Density and see page
152-155 for Sheath Materials.
• See next page for stock items
6000
9000
12000
15000
18000
21000
Phone: 978-777-0070
Fax: 978-774-2409
Cartridge Heaters
Immersion
▼ IN STOCK ITEMS ▼
Immersion Heaters
Supplied with: Type SF1 leads, Type SF3S terminals
U.L. Recognized — E56973 C.S.A. Certified — LR-16386
Cat. No.
EM62-6/SF25C
EM62-6/SF25C
EM62-6/SF25C
EM75-6/SF25C
EM75-6/SF25C
EM75-6/SF25C
EM1.2-11/SF25C
EM1.2-11/SF25C
EM1.2-11/SF25C
Dia.
5
⁄8"
5
⁄8"
5
⁄8"
3
⁄4"
3
⁄4"
3
⁄4"
11⁄4"
11⁄4"
11⁄4"
Wattage Voltage
100
120
400
120
400
240
125
120
500
120
500
240
250
120
1000
120
1000
240
Web: www.hotwatt.com
Watts/in2 Weight
9
.40
37
.40
37
.40
9
.50
38
.50
38
.50
6
2.75
24
2.75
24
2.75
Lead Const.
12" w/epoxy seal
12" w/epoxy seal
12" w/epoxy seal
12" w/epoxy seal
12" w/epoxy seal
12" w/epoxy seal
S&N w/box & epoxy seal
S&N w/box & epoxy seal
S&N w/box & epoxy seal
Email: sales@hotwatt.com
Fittings
1
⁄2"NPT
1
⁄2"NPT
1
⁄2"NPT
3
⁄4"NPT
3
⁄4"NPT
3
⁄4"NPT
11⁄4"NPT
11⁄4"NPT
11⁄4"NPT
IMMERSION
Length
6"
6"
6"
6"
6"
6"
11"
11”
11"
31
Cartridge Heaters
Immersion
Terminal Enclosure Options
Installation Options
SF13A: General purpose box. NEMA No. 1. 2 ⁄4" x 1 ⁄2" x 1 ⁄2".
IMMERSION
3
1
1
SF26: Stainless steel flange. Mounting hole centers for 1⁄4" to 5⁄8"
diameters is 11⁄8" and for 3⁄4" diameter is 15⁄32". Special flange sizes
available upon request.
SF27: Stainless steel riser and support feet for over the side
immersion heaters. Consult factory for availability.
Available on:
• 1⁄4" to 1" diameter.
SF13B: Moisture resistant box. Mounted on NPT coupling head fitting.
Available on:
• 3⁄8" to 11⁄4" diameter.
SF13C: Explosion resistant box. Mounted on NPT coupling head fitting.
XS76: Straight thread with nut. Specify thread size and if bushing is
to be standard (hex outside vessel) or inverted (hex inside vessel).
Voltage
Available on:
• 3⁄8" to 11⁄4" diameter.
Standard voltages are either 120V or 240V. Other voltages are available.
SF13D: General purpose box. NEMA No. 1. Rust resistant steel 4"
octagonal.
Tolerances
Wattage tolerance is +5%, -10% at rated voltage.
Length tolerances are ±2% with a ±1⁄16" minimum.
How to Order
After determining the wattage required and the line voltage available,
determine the physical space available for heaters and the numbers
of heaters required.
Review page 31 for stock items.
Review other special features, see page 22-27.
Specify: catalog number, wattage, voltage, lead type, bushing type,
and special features required.
Available on:
• 11⁄4" to 23⁄8" diameter.
32
Example: EM62-6/700W240V/SF1-12/SF13A/SF25B.
Phone: 978-777-0070
Fax: 978-774-2409
Cartridge Heaters
Special Immersion
Mini Circulation
IMMERSION
Features:
Temperature Control
• The Miniature Circulation Heater is a packaged heater for heating
small volumes of liquids as in photographic developer solutions,
chemicals, dyes and inks.
Thermocouple mounting fitting is available for use with the standard
miniature circulation heater. The fitting is threaded into the exit end
as shown below. Specify TC-5 fitting. See pages 131-134 for details
on temperature controllers and probes.
• Constructed of 316 series stainless steel.
• Pressures to 100 psig.
Construction:
1 Heliarc weld.
2 Stainless steel sheath.
3 Liquid tubular wire.
4 Ground post.
5 Post terminals.
6 Connection box. 2 ⁄ " x 1 ⁄ " x 1 ⁄ ".
Specifications
3
4
1
2
1
2
▼ Manfactured Items ▼
Maximum Amperage: 20
Cross Sectional Flow Area: .152 Sq. In.
Sizes:
Length
Heated Length
Catalog No.
6"
8"
10"
12"
18"
4"
6"
8"
10"
16"
PFO-6
PFO-8
PFO-10
PFO-12
PFO-18
Maximum
Wattage
TC5
PF0
600
900
1200
1500
2400
Above wattages area based on 50 watts per square inch for use with
water at low flow. Higher flow rates and/or different liquids will effect
allowable watt densities. Consult factory.
* Thermistor adapter and catalog number TH-1 must be used for
thermistor probe mounting in the TC5 fitting.
Sizes between those listed and larger in diameter are available.
Consult factory.
Web: www.hotwatt.com
Email: sales@hotwatt.com
33
Cartridge Heaters
Special Immersion
▼ IN STOCK ITEMS ▼
Pure Flow Air Heaters
IMMERSION
Supplied with: Type SF3S terminals Type SF13A enclosure
Length
6"
6"
6"
8"
8"
8"
10"
10"
10"
12"
12"
12"
LENGTH
Cat. No.
PFO-6
PFO-6
PFO-6
PFO-8
PFO-8
PFO-8
PFO-10
PFO-10
PFO-10
PFO-12
PFO-12
PFO-12
PFO
34
Dia.
11⁄4"
11⁄4"
11⁄4"
11⁄4"
11⁄4"
11⁄4"
11⁄4"
11⁄4"
11⁄4"
11⁄4"
11⁄4"
11⁄4"
Wattage
100
400
400
150
600
600
250
1000
1000
300
1200
1200
Voltage
120
120
240
120
120
240
120
120
240
120
120
240
Watts/
Linear Inch
23
91
91
23
94
94
30
120
120
29
115
115
Weight
1.00
1.00
1.00
1.18
1.18
1.18
1.37
1.37
1.37
1.55
1.55
1.55
SF13A
Phone: 978-777-0070
Fax: 978-774-2409
Terminals
S&N w/enclosure
S&N w/enclosure
S&N w/enclosure
S&N w/enclosure
S&N w/enclosure
S&N w/enclosure
S&N w/enclosure
S&N w/enclosure
S&N w/enclosure
S&N w/enclosure
S&N w/enclosure
S&N w/enclosure
Cartridge Heaters
Special Immersion
U.L. Recognized-E56973
IMMERSION
▼ Manfactured Items ▼
Applications:
• Restaurant Steam Tables
• Humidifiers
• Water Tanks
• UL Recognized component. - E56973
• Food Cookers
• Process Water Heaters
Features:
• All stainless steel with heliarc welds — No copper or braze material in contact with water.
• Patented—Low water protected—Automatic internal high limit—
Shuts off heater, then resets itself.
• Flexible hook-up leads for wire nuts.
• Easy to clean.
• Easy mounting through a 27⁄16" diameter (2" knockout) hole in
bottom or side of tank — No need for mounting fittings.
• Other sizes and ratings available — Consult factory.
L
Dim
Catalog
Number
K.W.
Volts
Line
Amps
Phase
8
8
8
12
12
12
14
14
14
18
18
18
18
18
18
22
22
22
WB1511
WB1521
WB1541
WB3011
WB3021
WB3041
WB4021
WB4041
WB4051
WB5021
WB5041
WB5051
WB5023
WB5043
WB5053
WB7023
WB7043
WB7053
1.5
1.5
1.5
3
3
3
4
4
4
5
5
5
5
5
5
7
7
7
120
208
240
120
208
240
208
240
480
208
240
480
208
240
480
208
240
480
12.5
7.2
6.3
25.0
14.4
12.5
19.2
16.7
8.3
24.0
20.8
10.4
13.9
12.0
6.0
19.4
16.8
8.4
1
1
1
1
1
1
1
1
1
1
1
1
3
3
3
3
3
3
How To Order
• Specify Catalog Number from table above.
Web: www.hotwatt.com
Email: sales@hotwatt.com
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